A while ago - before you introduced other changes to Portfolios (don't recall the specifics; it was a while ago) - the export file had a default name I could manually insert (just) a date into the fn (in File Explorer).
I export 1 of my 10 "active" portfolios every business day - the one where I track the status of all my DRP stocks. All my other portfolios mimic the approx contents of my brokerage accounts - which I check directly at brokerages each day.
My life would be a tad easier if I didn't have to manually replace
"portfolio (##).csv" with "Dec30 DRPquotes" (for example) every day.

BTW - Thanks for fixing the error where the export request ALSO initiated a PDF print. Good work!